NPI registry status
Active
2026 NPPES data Ambulatory Care Registered Nurse NPI 1649772237 CNP
Verify on CMS → Shannon Stewart, CNP
Ambulatory Care Registered Nurse in Houlton, Maine.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,150 in Ambulatory Care Registered Nurse, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
4K
Medicare Part D claims · 273 beneficiaries · Ambulatory Care Registered Nurse avg: 695
Generic prescribing
83%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Shannon Stewart, CNP filed 3,563 Medicare Part D claims in 2023 as a Ambulatory Care Registered Nurse in Houlton, Maine, prescribing 83% generic.
- 4K
- Part D claims, 2023
- 83%
- generic prescribing
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Shannon Stewart, CNP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,563 Top 10% higher than 90% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Shannon Stewart, CNP?
Quality data not reportedPrimary specialty
Ambulatory Care Registered Nurse
Medicare Part D claims
3,563 5× vs specialty avg
Specialty distribution in Maine
How Ambulatory Care Registered Nurse compares to other specialties among Maine providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Ambulatory Care Registered Nurse. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Shannon Stewart, CNP appears in the CMS NPPES registry as an Ambulatory Care Registered Nurse provider holding CNP credentials at 56 BANGOR ST, Houlton, ME, 04730, with a listed phone of (207) 521-0022. NPI 1649772237 was issued on 02/28/2018.
Medicare Part D records for calendar year 2023 show 3,563 prescription claims written by this provider, covering 273 Medicare beneficiaries and totaling roughly $443K in drug spend, split 15% brand-name and 83% generic by claim count, with an opioid prescribing rate of 5.8%.
Ambulatory Care Registered Nurse is a narrow specialty nationwide, with 3,150 enrolled providers across 53 states and an average of 695 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1649772237 |
|---|---|
| Specialty | Ambulatory Care Registered Nurse |
| Credentials | CNP |
| Gender | Female |
| NPI Issued | 02/28/2018 |
Hospital and facility affiliations
Facilities where Shannon Stewart, CNP bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Katahdin Valley Health Center
Houlton, ME
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Shannon Stewart, CNP - brand share 15.0%
Ambulatory Care Registered Nurse average
15% brand-name claims vs 83% generic, on 3,563 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
3,563
Total Claims
$443K
Total Drug Cost
273
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,796
- Total Day Supply
- 193,920
- Brand vs Generic
- 15% brand / 83% generic
- Brand Drug Cost
- $349K
- Generic Drug Cost
- $92K
- Opioid Claims
- 206 (5.8% rate)
- Antibiotic Claims
- 59
Patient Demographics
- Average Patient Age
- 67.7 years
- Avg HCC Risk Score
- 1.28
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 81, 65-74: 123, 75-84: 49, 85+: 20
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Shannon Stewart, CNP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
159 claims
- Gabapentin
Gabapentin
139 claims
- Levothyroxine Sodium
Levothyroxine Sodium
109 claims
- Lisinopril
Lisinopril
100 claims
- Pantoprazole Sodium
Pantoprazole Sodium
87 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
80 claims
- Metformin Hcl
Metformin Hcl
73 claims
- Furosemide
Furosemide
71 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 159 |
| Gabapentin | 139 |
| Levothyroxine Sodium | 109 |
| Lisinopril | 100 |
| Pantoprazole Sodium | 87 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 80 |
| Metformin Hcl | 73 |
| Furosemide | 71 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 64 |
| Tramadol Hcl | 57 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ambulatory Care Registered Nurse Overview
How Shannon Stewart, CNP fits within the Ambulatory Care Registered Nurse landscape nationally.
3,150
Ambulatory Care Registered Nurse Providers in US
53
States with Ambulatory Care Registered Nurse
695
Avg Claims per Provider
Shannon Stewart, CNP's 3,563 claims are above the specialty average of 695.
Nearby Ambulatory Care Registered Nurse Providers in Maine
Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as Stewart.
Dr. Annie Apt-Brackett
RN
Perry, ME
Dr. Abigail Dalzell-Dixon
NP
Belgrade, ME
Tovah Foss
Portland, ME
Dr. Arletta Glidden
RN
Patten, ME
Dr. Kathy Ouellette
RN
Lewiston, ME
Compare Ambulatory Care Registered Nurse nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Maine medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Ambulatory Care Registered Nurse peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Maine
Frequently Asked Questions
What is Shannon Stewart, CNP's specialty? ▼
Shannon Stewart, CNP specializes in Ambulatory Care Registered Nurse and practices in Houlton, Maine. Credentials: CNP.
How much does Shannon Stewart, CNP prescribe under Medicare Part D? ▼
In 2023, Shannon Stewart, CNP wrote 3,563 Medicare Part D claims totaling $443K in drug costs for 273 beneficiaries.
Where is Shannon Stewart, CNP located? ▼
Shannon Stewart, CNP is located at 56 BANGOR ST, Houlton, ME, 04730. Phone: (207) 521-0022.
What is Shannon Stewart, CNP's NPI number? ▼
Shannon Stewart, CNP's National Provider Identifier (NPI) is 1649772237, issued on 02/28/2018.
Does Shannon Stewart, CNP prescribe more brand-name or generic drugs? ▼
Shannon Stewart, CNP's prescribing is 15% brand-name and 83% generic drugs by claim count, with $349K in brand drug costs.
Does Shannon Stewart, CNP prescribe opioids? ▼
Yes, Shannon Stewart, CNP had 206 opioid claims in 2023 with an opioid prescribing rate of 5.8%.
How many Ambulatory Care Registered Nurse providers are there in the US? ▼
There are 3,150 Ambulatory Care Registered Nurse providers across 53 states in the US. The average Ambulatory Care Registered Nurse provider writes 695 Medicare Part D claims per year.
What drugs does Shannon Stewart, CNP prescribe most often? ▼
Based on 2023 Medicare Part D data, Shannon Stewart, CNP's most frequently prescribed drugs include Atorvastatin Calcium, Gabapentin, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Shannon Stewart, CNP accept Medicare? ▼
Shannon Stewart, CNP appears in CMS Medicare data with 3,563 Part D claims and 273 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Shannon Stewart, CNP's credentials? ▼
Shannon Stewart, CNP's NPI is 1649772237 with credentials CNP. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.